<template>
  <div>
    <ul>
      <li v-for="item in arr" :key="item">
        {{ item }}
      </li>
    </ul>
    <button @click="go">走一走</button>
  </div>
</template>

<script>
export default {
  data () {
    return {
      arr: ['帅哥', '美女', '程序员']
    }
  },
  methods: {
    go () {
      this.arr.push(this.arr[0])
      this.arr.shift()
    }
  }
}
</script>

<style scoped lang="less"></style>
